<!DOCTYPE html>
<html>
<head>
  <style>
      p { background:yellow; }
      </style>
  <script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
  <input id="test" type="submit" value="Submit" />

      <p id="testp" style="display: none">Hello  2</p>
<script>
    $("#test").click(function () {
    $("#testp").show("slow");
    });
    </script>

</body>
</html>